Do you  have a south-facing unshaded roof? You would probably be a good candidate for solar electricity.  Find out about residential solar at a Solar Open House this weekend at the home of Ken Farbstein, who had solar electric panels installed in 2010.  Stop by Ken’s home, 307 Brookline Street in Needham (near the high school) on Saturday, November 10, from 11 a.m. to 2 p.m.    Ken will be there to answer questions and will be joined by a representative of Sunlight Solar, the company that installed the panels. They will explain how tax rebates and payments for the clean energy produced have made solar panels more affordable than ever. RSVP to Ken Farbstein at 781-444-5525.